Perhaps you should try some spelling variations:
"trinh doan ngoc snippets" » "trinh toan ngoc snippets", "thinh doan ngoc snippets", "trinh dan ngoc snippets", "trinh hoang ngoc snippets", "trinh tran ngoc snippets", "trinh van ngoc snippets", "trinh doan ngoc slippers"
"dung rung code snippets" » "dung trung code snippets", "duong rung code snippets", "dung ung code snippets", "dung rung code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("trinh doan ngoc snippets") or ("dung rung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh doan ngoc snippets") OR ("dung rung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh doan ngoc snippets ) or ( dung rung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh doan ngoc snippets") or ("dung rung code snippets"))) or ("locating bug code snippets"))*.